EP 0564286 A3 19940316 -
Publication
Application
Priority
- JP 3377393 A 19930223
- JP 8250792 A 19920403
Abstract (en)
[origin: EP0564286A2] A zinc phosphate coating film suitable for cationic electrodeposition coating and superior in both of coating film adhesion and corrosion resistance (especially, warm brine resistance and scab resistance) is formed by a conversion treatment of a metal surface using an acidic zinc-phosphating solution which does not contain a nickel ion as an essential component. The conversion treatment is carried out by bringing a metal surface into contact with a zinc-phosphating solution containing a zinc ion of 0.1 to 2.0 g/l, a phosphate ion of 5 to 40 g/l, a lanthanum compound of 0.001 to 3 g/l in terms of a lanthanum metal, and a phosphating accelerator, thereby the zinc phosphate coating film is formed on the metal surface.
IPC 1-7
IPC 8 full level
C23C 22/12 (2006.01); C23C 22/18 (2006.01); C23C 22/36 (2006.01)
CPC (source: EP US)
C23C 22/12 (2013.01 - EP US); C23C 22/182 (2013.01 - EP US); C23C 22/188 (2013.01 - EP US); C23C 22/362 (2013.01 - EP US); C23C 22/368 (2013.01 - EP US)
Citation (search report)
- [Y] WO 8400386 A1 19840202 - FORD MOTOR CANADA [CA], et al
- [DY] EP 0106459 A1 19840425 - NIPPON PAINT CO LTD [JP] & JP S6136588 A 19860221 - OYO CHISHITSU KK
- [A] EP 0411609 A2 19910206 - NIPPON PAINT CO LTD [JP]
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0564286 A2 19931006; EP 0564286 A3 19940316; US 5328526 A 19940712
DOCDB simple family (application)
EP 93302581 A 19930401; US 4096493 A 19930331